Combined feed device and magnetic separator



g- 6, 1929- o. s. ANDERSON 1,723,119

COMBINED FEED DEVICE AND MAGNETIC SEPARATOR Filed Sept. 14. 1928 4 Sheets-Sheet l 6H0: no 1 J Aug. 6, 1929. o. s. ANDERSON COMBINED FEED DEVICE AND MAGNETIC SEPARATOR Filed Sept. 14. 1928 4 Sheets-Sheet 2 1929- Q. s. ANDERSON 1,723,119

COMBINED FEED DEVICE AND MAGNETIC SEFARATOR Filed Sept. 14, 1928 4 Sheets-Sheet 5 Aug. 6, 1929.

O. S. ANDERSON COMBINED FEED DEVICE AND MAGNETIC SEPARATOR Filed Sept. 1 1928 4 Sheets-Sheet 4 Patented Aug. 6, 1929.-

UNITED STATES PATENT OFFICE.

ORLIN S. ANDERSON, OF LAKEWOOD, OHIO, .ASSIGNOR TO THE V. D. ANDERSON COM- PANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

COMBINED FEED DEVICE AND MAGNETIC SEPARATOR.

Application filed September 14, 1928. Serial No. 305,969.

This invention relates to feeding mechanisms and will be described as embodied in a device for feeding material to the tempering devices commonly associated with presses for extracting oils and other liquids.

In feeding meat scraps, crushed seeds and various other materials to extracting presses or to tempering devices associated with such presses, it has been found necessary to provide for the removal from the feed of magnetic materials such as small pieces of iron and steel.

The present invention provides a variable feed device which not only controls the rate of feed of the material but also so favorably locates the magentic separator that the magnetic particles are given an opportunity to Work their way through the material being fed and attach themselves firmly to the element which removes them. This result is secured in the example illustrated by feeding the material by means of a conveyor belt, one end of which is supported by a magnetic pulley of known form.

The belt and pulley are driven intermittently, that is, they have alternating periods of rest and motion, the range of each movement being subject to adjustment to vary the rate of feed.

One characteristic of the present invention is the arrangement of the driving mechanism so that the maximum movement of the belt and pulley is less than the arc of contact of the belt with the pulley so that any magnetic piece which may be on the belt will necessarily come to rest on the belt in the range of influence of the pulley and thus be given ample time to settle through the non-magnetic material into contact with the ulle p A greferred embodiment of the invention is illustrated in the accompanying drawings, in which,

Fig. 1 is an end view of the tempering device with this invention applied.

Fig. 2 is an enlarged view of a portion of Fi 1.

ig. 3 is a section on the line 33 of Fig. 2.

Fig. i is a fragmentary section on the line 4-4 of Fig. 3.

Fig. 5 is a section on the line 55 3, on a somewhat reduced scale.

Fig. 6 is a section on the line 6-6 of Fig. 1.

Fig. 7 is a. view similar to a portion of of Fig.

Fig. 2 and showing the driving pawl at the moment of its engagement.

Fig. 8 is a section on the line 8-8 of Fig. 3.

Fig. 9 is a perspective view of the latch disk and its mechanism, a fragment of the ratchet wheel being shown in perspective.

Fig. 10 is a perspective view of the latch pawl.

The tempering device, which is intended to be typical of any device which might be fed by this mechanism, is indicated generally by 11. The particular form is not a feature of the invention. Mounted on and above the tempering device 11 is a trough-like structure made up of side plates 12, between which are journaled two pulleys. The larger of the two is a magnetic pulley 13. Since the exact construction of the magnetic pulley is not a feature of the invention it has merely been conventionally illustrated.

The pulley is fast on a shaft 14 which is mounted in bearings 15 and 16, the bearin s being supported by the side plates 12. T e other pulley 17 is simply a supporting idler and is mounted in bearings 18. These are slidable in guide brackets 19 and may be adjusted by thrust screws 21 to vary the tension of the feeding belt 22. A feeding hopper 23 discharges material on to the belt and flow from the sides of the belt is precluded by the lateral deflectors 2 1. The top of the belt moves to the left relatively to Fig. l and the material carried by the belt flows over the belt as it passes around the magnetic pulley 13 and falls directly into the temper-- ing device 11. Particles of magnetic material are thus brought into the range of action of the pulley 13 and instead of falling free of the belt are carried around beneath the pulley l3 and are stripped therefrom as the belt 22 leaves the pulley on the lower side. By this time the pulley 22 has passed above a removable box or slide 25 so that the particles are intercepted and collected in the box.

It will beobserved therefore that the f intermittent feed assisting the movement 01' the magnetic particles into close contact with the belt. This action is intensified by so designing the device as to limit the maximum extent of each intermittent movement smaller sprocket 29 which is keyed on the intermittent drive shaft 31. The shaft 31 is journaled in a bearing 32 which is supported by a bracket structure 33 bolted to one of the plates 12. The outer end of the shaft 31 carries keyed thereto a ratchet wheel 34, and between the hub of the ratchet wheel 34 and theend of the bearing 32 there is mounted a latch disk 35 which is freely rotatable on the shaft 31 and whose construction is most clearly shown in Figs. 4 and 9. v

The disk 35 is the driving element of the combination and may itself be driven in any suitable manner. I find it convenient, in the example illustrated, to drive the disk 35 from a shaft 36 which forms a part of the tempering device 11, the drive being by means of a sprocket 37 on a shaft 36, chain 38 and sprocket 39. The sprocket 39 is bolted to the disk 35.

Mounted on the disk 35 is a stud 41 and journaled on this stud is a pawl 42 in position to move into and out of engagement with a ratchet wheel 34. It is urged toward such engagement by a tension spring 43 which is connected at 44-to the disk 35 and which at its other end is connected at 45 to an arm 46 integral with the pawl 42. Pawl 42 has also an integral tail 47 which may be depressedv or forced radially inward to disengage the pawl from the ratchet 34. The

awl also carries a lug or pin 48 which proects toward the plate 35 and which when the pawlis moved to disengaged position, may be engaged by a shoulder 49 formed for th1s purpose on a lever 51. The lever 51 is pivoted on the disk 35 by means of a ournal pin 52 and is urged in direction to engage the stud 48'bymeans of a coil spring 53. One end of the spring 53 is connected with the lever 51 and the other is connected at 54 to the plate 35. The outer end of the lever 51 projects beyond the periphery of the disk 35 in position to be struck and wiped back by an adjustable trip provided for this purpose and hereafter described.

The projecting end of the lever 51 is formed with a trip surface 55 and to facilitate disengagement the stud 48 on the pawl 42 may be provided with a roller 56, as shown. Mounted fixedly on the bracket 33 is an arm 57 which carries at its end a roller 58, the roller 58 being so positioned that it is in the path of the tail 47 of pawl 42 and operates to depress the tail 47 as this swings around with the disk 35, until the pawl 42 clears the rac'het 34 and is latched in its disengaged position by the shoulder 49 on the lever 51 which then moves to engaging position by the action of the spring 53.

The collision of the tail 47 with the roller 58 thus'acts to terminate an intermittent drive connection between the disk 35 and the ratchet wheel 34. The connection is restored when the lever 51 is wiped down by an adjustable trip which engages the surface 55 of the lever 51; This trip consists of a stud 61 which is radially adjustable in a bracket 62 by means of a set screw 63.

The bracket 62 (see Fig. 8) has a radially extending portion 64 which terminates in a hub 65 embracing a cylindrical portion of the bracket 33. This cylindrical portion surrounds a portion of the bearing 32. The hub 65 is split, as shown at 66, and maybe clamped around the cylindrical portion of the bracket 33 by means of a threaded clamping rod 67. This is guided in a bearing 68 at the junction of the bracket 62 and radial portion 64' and may be turned by the handle 69 to clamp or release the hub 65. \Vhen released the bracket 62 and radial arm 64 may be swiveled on the bracket 33 to position the stop 61 at any point in the path of the tail 55 of lever 51.

The device operates as follows:

Whenever the tempering device 11 is in use the shaft 36 will be rotated. Consequently the disk 35 will also be rotated. Whenever the pawl 42 passes the roller 58 the pawl will be disengaged and latched in its disengaged position. Continued rotation of the disk 35 will however bring the tail 55 of lever 51 into collision with trip 61, the time of such collision being determined by the angular adjustment of the arm 64, as already described. When this collision occurs the lever 51 will be caused to release the stud 48 and the spring 43 will then bring the pawl 42 back into engagement with the ratchet 34. It follows therefore that the shaft 31, and eonsequentl the sprocket 29, will have alternate perio s of rest and motion, the total of the two periods making up one rotation of the disk 35.

It will be apparent from a consideration of the drawing that the adjustment of the arm 64 makes it possible to vary the period of engagement of pawl 42 from practically nothing to something less than a complete rotation of the disk 35. The sprocket 29 is purposely made much smaller than the sprocket 27 so that with the maximum intermittent movement of the sprocket 29 (which is less than a complete rotation) the pulley 22 will move decidedly less than its total are of contact with the magnetic pulley 13 Hence all portions of thebelt come to rest in the zone of influence of the pulley 13, thus offering an opportunity for magnetic pieces to settle through the non-magnetic material on the belt and reach a favorable position to be carried beyond the point of discharge of the non-magnetic material from the belt.

While the mechanism shown has been successfully used, and. for practical purposes is preferred, various modifications of the structure are possible and are contemplated, and no necessary limitation to the specific structure illustrated is implied.

What is claimed is;

1. A feeding device and magnetic separator, comprising in combination, a feeding conveyor belt; a magnetic pulley supporting said belt; means for intercepting magnetic material freed from said belt as it passes ofi said pulley; and an intermittent drive for said belt.

2. A feeding device and magnetic separator, comprising in combination, a feeding conveyor belt; a magnetic pulley supporting said belt andarranged to carry magnetic material beyond the point of discharge of other material from said belt; means for collecting said magnetic material; and an intermittent drive for said belt comprising a ratchet wheel, a concentric rotary member, a pawl carried by said member, and a pair of stops, one of which causes said pawl to engage the ratchet and the other causes it to disengage.

3. A feeding device and magnetic separator, comprising in combination, a feeding conveyor belt; a magnetic pulley supporting said belt and arranged to carry magnetic material beyond the pointof discharge of other materials from said belt; means for collecting said magnetic material; an intermittent drive for said belt comprising a ratchet wheel, a concentric rotary member, a pawl carried by said member, and a pair of stops, one of which causes said pawl to engage the ratchet and the other causes it to disengage; and means for adjusting one of said stops angularly about theaxis of said member and ratchet to vary its point of action.

4. A feeding device and magnetic separator comprising in combination, a feeding conveyor belt; a magnetic pulley around which said belt passes; means for intercepti-ng magnetic material freed from said belt as it passes off said magnetic pulley; and r means for driving said belt intermittently, the range of each intermittent motion being less than the are of contact with the magnetic pulley.

, 5. A feeding device and magnetic separator, comprising in combination, a feeding conveyor belt; a magnetic pulley around which said belt passes; means for intercepting magnetic material freed from said belt as it passes off said magnetic pulley; means for driving said belt intermittently; and means for adjusting the length of the intermittent movements, the maximum not exceeding the arc of contact of the belt with v the pulley.

' In witness whereof I have signed my name to this specification. ORLIN S. ANDERSON. 

